export default function generateUUID () {
  let timestamp = new Date().getTime()
  const uuid = 'xxxxxx'.replace(/[xy]/g, function (c) {
    const r = (timestamp + Math.random() * 16) % 16 | 0
    timestamp = Math.floor(timestamp / 16)
    return (c === 'x' ? r : (((r & 0x3) | 0x8))).toString(16)
  })
  return uuid
}